Newsarama talks a little bit about the guy who organized the We Are Robin group.
Yes Alfred has been an enabler but this has crossed the line. Not even Bruce has done something like this in normal canon. There's also a difference between collecting these kids one by one, training them on a daily basis and being with them in the field vs. engaging remotely.
Dick, Jason, Tim and Damian were also taken in to become family. That strengthened their bond and makes them able to work together despite not being trained at the same time. I don't know about the others but it's been said in two different canons that Jason spent months preparing to be Robin. Were these kids even trained?
I assume their confront Alfred over this and if they don't get mad I'll be surprised. Remember the Batman and Robin arc where they dressed up in Robin costumes in honor of Damian and said he earned the mantle? The costumes being Alfreds' idea? Well it's like a slap in the face for him now because Alfred has formed a group of them and handed out the role they didn't earn.
Out of all of them I have the hardest time imagining how Dick will react other than shock. His main concern would likely be Damian and the WAR members well being. I could see him worrying about Alfred taking things so far.
Tim has spent most of the relaunch with the Titans because he thinks superhero kids should have a support group and wants to keep them from harm. He does this by personally looking out for them. He likes order and the solicits imply chaos is breaking out with the WAR gang. Alfred should know better and I think part of him will feel bad for Damian too.
Someone already died which can't sit well with Jason. I think he'd feel for these kids (at least I hope he does) and draw similarities with himself. The fact it's Alfred treating these kids like disposable soldiers would hurt. He's making these kids targets which means it's only a matter of time before someone like Joker goes after them. Jason would likely see the irony of the Robin curse of being replaced and like Dick and Tim knows how much that hurts.